CN111577967A - Air fault detection device and application thereof - Google Patents
Air fault detection device and application thereof Download PDFInfo
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- CN111577967A CN111577967A CN202010380473.4A CN202010380473A CN111577967A CN 111577967 A CN111577967 A CN 111577967A CN 202010380473 A CN202010380473 A CN 202010380473A CN 111577967 A CN111577967 A CN 111577967A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0025—Electrical or magnetic means
- F16K37/005—Electrical or magnetic means for measuring fluid parameters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
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Abstract
The air fault detection device comprises an MCU module with a preset monitoring program, a GPS module, a communication module, a gas-liquid signal processing module, a memory card, a man-machine interaction module, a fault LED lamp and an antenna, wherein the GPS module, the communication module, the gas-liquid signal processing module, the memory card, the man-machine interaction module, the fault LED lamp and the antenna are respectively connected with the MCU module; on the air fault detector side, a circuit is connected with a pressure sensor, a gas-liquid sensor and a water leakage detection module which are used for detecting the pressure change and the gas-liquid state in the air valve. The application of the air fault detection device can be divided into a low power consumption type and a common power consumption type according to the power supply condition; when the pressure change value in the pipeline is monitored to be larger than the threshold value set in the MCU module, the pressure change value is continuously recorded within the set time. When the pressure change value in the pipeline is monitored to be larger than the threshold value set in the MCU module, the MCU module is awakened firstly, then the pressure change value is continuously recorded in set time, and when no fault alarm occurs, the MCU module is in a dormant state.
Description
Technical Field
The application relates to an air fault detection device applied to a fluid conveying pipeline, which mainly monitors gas-liquid parameters in an air valve or a pipeline so as to feed back the working state of the air valve; the application also relates to an application method of the air fault detector in monitoring the air valve.
Background
The air valve (air inlet and outlet valve) is a necessary component of the pressure flow pipeline water transmission and distribution system, and has the important functions of continuously exhausting air under pressure state, improving water transmission efficiency, slowly exhausting air under the working condition of water hammer, reducing water hammer and closing high pressure and the like.
In practical applications, pipeline accidents caused by poor quality and performance of air valves (intake and exhaust valves) or blockage of impurities in water are frequent, and the common air valve failures include the following situations:
1. the pipeline is not smooth in water filling and air exhausting due to the electrochemical adhesion of floating balls of the air valve, and the pipe collapse damage is caused by no air intake under the vacuum working condition;
2. the water delivery efficiency is reduced due to the pipeline gas accumulation caused by the blockage of the high-pressure micro exhaust valve;
3. the water hammer protection type air valve slowly closes the dish and infinitely flows the function under the water hammer operating mode, can not control the water column speed of closing, leads to the protection inefficacy.
Among the above problems, the most common is the failure of air valve seal, well flooding accidents caused by water leakage, and even the damage to civil houses and hydraulic structures. In order to prevent the technical problems, in the traditional pipeline water delivery automatic control system, only the pressure at the air valve is monitored, but effective feedback cannot be provided for the actual working state of the air valve, and operation and operating personnel cannot timely eliminate the air valve fault, so that serious pipeline safety accidents still can be caused.
Meanwhile, the conventional RTU acquisition and transmission unit has large power consumption because of being always in the power consumption of acquisition and transmission modes, and if a common non-rechargeable battery cannot meet the daily requirement of the conventional RTU acquisition and transmission unit, the power supply provided by the conventional RTU acquisition and transmission unit is a solar power supply, so that the conventional RTU acquisition and transmission unit can be automatically charged. In a real environment, the solar panel is unstable to charge, especially in continuous rainy days and other sunnless days, the solar panel cannot charge the battery, so that the whole equipment is not used, the construction investment and maintenance cost of the solar power supply are high, and the intensive monitoring limit on the water delivery system is large.
And, the conventional RTU acquisition and transmission unit can only generally acquire and transmit timing data with data greater than 1 second, on one hand, the acquisition mode can cause a large amount of data redundancy, on the other hand, the air valve needs continuous data acquisition in pressure and gas-liquid state transient changes under the working conditions of air intake, air exhaust and water hammer protection, and meanwhile, a storage and transmission mechanism of effective data is lacked, the protection process of the air valve cannot be completely monitored, and the performance of the air valve cannot be evaluated and improved.
In addition, for long-distance other fluid medium conveying pipelines, the conveying efficiency is reduced, and abnormal high pressure occurs in the pump stopping or valve closing operation process, high-speed and accurate gas-liquid state monitoring and data acquisition and transmission are also carried out on key nodes of pipeline fluctuation in a targeted manner, and corresponding measures are provided, which cannot be achieved by the RTU acquisition and transmission unit in the prior art.
Disclosure of Invention
The application aims to provide a monitoring device capable of providing differential acquisition, storage and transmission modes for pressure and state data of an air valve in normal and fault states; on the basis of the purpose, an application method is provided, which adopts distributed monitoring, displays and feeds back air valve exhaust, vacuum and water leakage faults to a control center in real time on site, displays the fault type of the air valve, enables workers to position and qualitatively maintain the fault air valve at the first time, provides data analysis for the effectiveness of the air valve under the working condition of a water hammer, and can ensure the integrity of alarm and data transmission.
The purpose of the application is realized as follows: an air fault detector comprises an MCU module, a GPS module, a communication module, a gas-liquid signal processing module, a storage card, a human-computer interaction module, a fault LED lamp and an antenna, wherein the MCU module is arranged in a shell and is preset with a monitoring program, and the GPS module, the communication module, the gas-liquid signal processing module, the storage card, the human-computer interaction module, the fault LED lamp and the antenna are respectively. On the air fault detector side, a circuit is connected with a pressure sensor, a gas-liquid sensor, a water leakage detection module and a power supply for supplying electric energy to the air fault detector, wherein the pressure sensor is used for detecting pressure change and gas-liquid state in the air valve. The pressure sensor and the gas-liquid sensor are arranged in a valve body below the air valve or on a flange short pipe below an air valve seat; the water leakage detection module is arranged at the bottom of the valve well. Meanwhile, the air fault detector can also communicate with a remote terminal through a wireless or wired network to send fault information and transmit monitoring data.
Furthermore, the power supply is commercial power, a solar panel and a large-capacity battery.
Furthermore, the gas-liquid sensing module is a capacitance type liquid level proximity switch, can detect the property of a fluid medium in the air valve, judges whether the fluid is liquid or air, and outputs a switching value signal.
Furthermore, the gas-liquid sensing module is a photoelectric liquid level sensor, can detect the property of a fluid medium in the air valve, judges whether the fluid is liquid or air, and outputs a switching value signal.
Further, the gas-liquid sensing module is an electrode liquid level sensor, can detect the resistivity of a fluid medium in the air valve and the resistivity of air, judges that the fluid is water or air, and outputs an analog quantity or switching value signal.
Furthermore, the pressure sensor can detect relative positive pressure and negative pressure, can effectively measure the pressure of the pipeline within the range from negative 0.1MPa to rated high pressure, and outputs an analog quantity signal or a digital signal.
Furthermore, the water leakage detection module is a liquid level float switch and can output a switching value signal when water is accumulated in the valve well.
Furthermore, the water leakage detection module is an electrode switch and can output a switching value signal when water is accumulated in the valve well.
Furthermore, the MCU module is a micro-processing unit and is divided into low power consumption and common power consumption according to the type of the power supply. Each of the modules is programmed with different logic programs for controlling and coordinating the operation of each module and the fault lamp, can be externally connected with a large-capacity memory card, has the functions of local data storage and SOCKET subpackage sending processing, and can send fault alarm information and fluid state data in a classified mode through the communication module.
Furthermore, the human-computer interaction module is a Bluetooth module, a reed switch magnetic control switch is arranged between the Bluetooth module and the MCU module, the reed switch magnetic control switch can be controlled by a magnet key to be opened, so that a circuit between the Bluetooth module and the MCU module is conducted, a human-computer interaction channel is established through the communication between a development program at the smart phone end and the MCU module, alarm information and data states are displayed on site, the limit parameters and alarm logic of the MCU module are set, and after the setting or checking is completed, the magnet key can be moved to close the Bluetooth module so as to save electric energy.
Furthermore, the human-computer interaction module is an LCD display screen and a keyboard, can display alarm information and data states on site, and sets diagnosis parameters and alarm logic of the MCU module.
Furthermore, the LED lamp can display the air valve fault type on site and prompt an operator to perform qualitative maintenance and troubleshooting.
Furthermore, the GPS module can provide time service, time correction and positioning functions for the MCU module, and is used for ensuring the accuracy of time and geographical positioning information.
Furthermore, the communication module can adopt an industrial communication module, a wireless module or a 4G communication module according to field application conditions, and realizes data interaction and information classification alarm between the air fault detector and the remote terminal in a wired or wireless mode.
Further, when the gas-liquid sensor is an electrode liquid level sensor, the gas-liquid signal processing module can convert direct current into alternating current to supply power to the gas-liquid sensor, and converts resistance signals acquired by the gas-liquid sensor into direct current switching value or analog quantity signals to be output to the MCU module after being judged by a set threshold value.
Further, an air fault detector may be classified into a low power consumption type and a general power consumption type according to power supply conditions.
The low-power-consumption air fault detector adopts a low-power-consumption MCU module, a power supply can use a built-in large-capacity battery, and the programmed logic diagnosis program can enable the MCU module, the communication module, the GPS module and the human-computer interaction module to be in dormancy and partial dormancy so as to maintain low-power-consumption operation.
Further, the low power consumption air detector automatically alarms, collects, stores and transmits air faults, normal data and transient data, a logic diagnosis program in the MCU operates by adopting an awakening and re-dormancy mechanism, and awakening conditions and an operation process comprise:
1. the human-computer interaction module adopts a Bluetooth module for checking and setting, the Bluetooth module is started by a magnet key and a reed switch, the MCU module is awakened for interaction and setting, and the Bluetooth module can be disconnected after the magnet key is pulled out, so that the power consumption of the Bluetooth module is avoided;
2. the remote terminal accesses, sets and releases the alarm, requests to wake up the MCU module by the communication module, sleeps again after the set time and can wake up again;
3. when the air valve has exhaust faults, the gas-liquid sensor sends a switching value signal of no water in the air valve to the MCU module, the MCU module is awakened to compare the pressure signal of the pressure sensor, when the detected pressure value is higher than the pressure value set in the MCU module, the pressure signal can be compared at set repeated intervals, after the faults are confirmed, the communication module sends exhaust fault alarms, and the alarm information is sent to sleep again successfully;
4. when the air valve has a vacuum fault, the gas-liquid sensor sends a switching value signal of no water in the air valve to the MCU module, the MCU module is awakened to compare the pressure signal of the pressure sensor, when the detected pressure value is smaller than a set low-pressure value, the pressure signal can be compared at set repeated intervals and time, after the fault is confirmed, the communication module sends a vacuum fault alarm, and the alarm information is sent to sleep again successfully;
5. when the gas-liquid sensor sends a switching value signal of no water in the air valve to the MCU module, the MCU module is awakened to detect a pressure signal of the pressure sensor, when a pressure value rising or falling value in unit time is larger than a pressure fluctuation value set in the MCU module, the pressure sensor is triggered to continuously record pressure data and a gas-liquid state to a local memory card in set time, data are sent to a remote terminal by an SOCKET sub-packaging mechanism, and the remote terminal sleeps again after the data are sent;
6. when the water leakage module outputs a switching value signal to the MCU module, the MCU module is awakened, and a water leakage accident alarm is immediately sent through the communication module;
7. the clock arranged in the MCU module can set time to wake up the local record and send normal pressure and gas-liquid state data to the remote terminal through the communication module.
The common power consumption type air fault detector uses a common power consumption MCU module, is powered by commercial power or a solar power supply, and can enable the MCU module, the communication module, the human-computer interaction module and the GPS module to be in a real-time online monitoring state through a built-in logic diagnosis program, and the air fault alarm, normal data and transient data acquisition, storage and transmission processes are as follows:
1. when the collected pressure signal value is greater than the set pressure and the gas-liquid sensor provides a switching value signal as air, the switching value signal can be compared at set repeated intervals, and an exhaust fault alarm is sent through the communication module after a fault is confirmed;
2. when the collected pressure signal value is smaller than the set low pressure value and the gas-liquid sensor provides a switching value signal as air, the vacuum fault alarm is sent through the communication module after the fault is confirmed through comparison of set repeated interval time;
3. when the switching value signal of the water leakage module is acquired, the water leakage accident alarm is immediately sent through the communication module;
4. the value can be set according to time, and the pipeline pressure and gas-liquid state data can be recorded at regular time, stored locally and uploaded to a remote terminal;
5. when the rising or falling value of the pressure value in unit time is larger than the pressure fluctuation value set in the MCU module, the pressure and the gas-liquid state can be continuously recorded in the set time, and the pressure and the gas-liquid state are locally stored and transmitted to the remote terminal.
The common power consumption type air fault detector and the low power consumption air fault detector have the main functional difference that the data acquisition modes of transient working conditions are different, the common power consumption type air fault detector is not limited by the awakening of a switching value signal of a gas-liquid sensor, when the pressure change value in a pipeline is monitored to be larger than a threshold value set in an MCU module, the pressure change value can be continuously recorded in set time, the pressure change value is locally stored and sent to a remote terminal, and the acquired transient variable pressure and gas-liquid state data are more comprehensive and complete.
Compared with the prior art, the application has the following remarkable advantages:
1. through the distributed gas-liquid monitoring devices arranged on the air valves of the pipeline or the pipe network, the exhaust, vacuum and water leakage faults of various air valves can be independently monitored on line, alarm information of different fault types is sent to a remote terminal, managers can conveniently maintain and eliminate the air valve faults in time, the water delivery economy is improved, and pipeline settlement accidents caused by vacuum pipe collapse and water leakage are avoided;
2. the low-power consumption type air fault detector adopts an awakening and re-dormancy operation mechanism, and can use a built-in high-capacity battery due to low power consumption, so that the low-power consumption type air fault detector is convenient for application in areas without power and areas which are inconvenient to be provided with solar power supply;
3. the special pressure fluctuation triggering recording, storing and transmitting functions of the air fault detector can avoid generating a large amount of redundant data on one hand, and can continuously acquire accident pressure key data under the condition of pipeline accidents on the other hand, and the remote terminal is used for carrying out graphical processing, analyzing and checking the effectiveness of the water hammer air valve, adjusting the opening of the air valve slow closing disc and the tensioning force of a vacuum valve spring, improving the slow closing characteristic and the vacuum air inlet performance of the air valve and improving the safety protection level of a pipeline;
4. the invention can also be used for monitoring the transmission of other liquid media, judging the influence of air on fluid transmission, and providing evaluation analysis for the fluid transmission state by the transmitted pressure data of the steady state flow and the transient flow.
Drawings
The specific structure of the application is given by the following figures and examples:
FIG. 1 is a schematic diagram of the circuit configuration of a low power air fault detector;
fig. 2 is a schematic diagram of a circuit configuration of a general power consumption air fault detector.
Legend: 1. the air valve, 2, the power, 3, pressure sensor, 4, gas-liquid sensor, 5, the detection module that leaks, 6, air fault detector, 7, the MCU module, 8, LED trouble lamp, 9, magnetic switch, 10, bluetooth module, 11, communication module, 12, storage card, 13, antenna, 14, remote terminal, 15, wired network.
Detailed Description
The present application is not limited to the following examples, and specific implementations may be determined according to the technical solutions and practical situations of the present application.
Example 1: an air fault detector 6 comprises a shell, a circuit board is connected with an MCU module 7 with a monitoring program in advance, a power supply 2, an LED fault lamp 8, a magnetic control switch 9, a Bluetooth module 10, a communication module 11 and a memory card 12, a circuit at the side of the MCU module 7 is connected with a pressure sensor 3 and a gas-liquid sensor 4 which are used for detecting pressure change and gas-liquid state in an air valve 1, and the pressure sensor 3 and the gas-liquid sensor 4 are fixedly arranged in a lower valve body of the air valve 1 or on a flange short pipe below a seat of the air valve 1; a circuit on the side of the MCU module 7 is also connected with a water leakage detection module 5 for monitoring accumulated water in the valve well, and the water leakage detection module 5 is arranged at the bottom of the valve well; the communication module 11 is connected with the antenna 13 to the outside of the valve well and used for sending alarm information and data interaction with the remote terminal 14.
Illustratively, the gas-liquid sensor 4 is embodied as a capacitive liquid level proximity switch, and can detect the property of a fluid medium in an air valve, and output a switching value signal when the fluid is air, and output no switching value signal when the fluid is water.
Illustratively, the gas-liquid sensor 4 is specifically a photoelectric liquid level sensor, and can detect the property of a fluid medium in an air valve, and output a switching value signal when the fluid is air, and output no switching value signal when the fluid is water.
Illustratively, the water leakage detection module 5 is specifically a float switch, which is normally opened when no water is present in the valve well, and outputs a switching value signal when water is accumulated in the valve well.
Illustratively, the power source 2 is embodied as a built-in large capacity battery, which provides power for the whole.
Illustratively, the human-computer interaction module is specifically a bluetooth module 10, a reed switch magnetic control switch 9 can be turned on by a special magnet key to be connected with the MCU module 7, a human-computer interaction channel is established through communication between a development program of the smartphone end and the MCU module 7, alarm information and data state are displayed on site, and limit parameters and alarm logic of the MCU module 7 are set.
The method is illustrative; the communication module 11 is specifically a wireless module or a 4G communication transmission module, and can realize data transmission and information classification alarm between the fault detector and the remote terminal 14 through the antenna 13.
The low-power consumption type air fault detector in the application embodiment comprises the following steps:
step 1: the reed switch magnetic control switch 9 is turned on by a magnet key, the circuit of the Bluetooth module 10 is conducted, the MCU module 7 is awakened, the development program of the smart phone end is communicated with the Bluetooth module 9, or the remote terminal 14 awakens the MCU module 7 through the communication module 11 through the antenna 13, and the diagnosis logic of the MCU module 7 is set. The gas-liquid sensor 4 has switching value signal input, air is in the pipeline, no switching value signal input is carried out, the pipeline medium is water, the pressure set values are two, one is lower than the minimum working pressure of the pipeline, and the other is a negative pressure value allowed by the pipeline;
step 2: when a pipeline runs and a gas-liquid sensor 4 installed on an air valve 1 outputs a switching value signal, an MCU module 7 is awakened to enter a fault judgment mode, when a pressure signal of a pressure sensor 3 is larger than a threshold value set by a program of the MCU module 7 in a fault detector 6, an exhaust fault is determined through comparison of set repeated detection times, an exhaust fault alarm message is sent to a remote terminal 14 through an antenna 13 by a communication module 11, and after the remote terminal 14 receives the fault alarm message, the air fault detector enters a sleep mode;
and step 3: when the pipeline is vacuumized, the gas-liquid sensor 4 installed on the air valve 1 outputs a switching value signal, the MCU module 7 is awakened to enter a fault judgment mode, when the pressure signal of the pressure sensor is greater than a negative pressure threshold value set by a program of the MCU module 7 in the fault detection and control device 6, the vacuum fault is determined through comparison of set repeated detection times, the communication module 11 sends exhaust fault alarm information to the remote terminal 14 through the antenna 13, and after the remote terminal 14 receives the fault alarm information, the air fault detector enters a sleep mode;
and 4, step 4: when the air valve well leaks water, the water leakage detection module 5 outputs a switching value signal to wake up the MCU module 7, immediately judges the water leakage fault, sends water leakage fault alarm information to the remote terminal 14 through the antenna 13 of the communication module 11, and confirms that the remote terminal 14 receives the fault alarm information, and then the air fault detector enters a sleep mode;
and 5: when the gas-liquid sensor 4 outputs a switching value signal, the MCU module 7 is awakened to enter a fault judgment mode, simultaneously, the monitoring logic of the MCU module 7 can trigger to continuously record pressure data and a gas-liquid state to the local memory card 12 within set time according to the pressure signal detected by the pressure sensor 3 when the rising or falling value of the pressure value within unit time is greater than the set pressure fluctuation value in the MCU module, the communication module 11 transmits the data to the remote terminal 14 through the antenna 11 by using an SOCKET packaging mechanism, and the remote terminal sleeps again after the data transmission is finished;
step 6: when a fault occurs, the MCU module 7 supplies power to the corresponding LED fault lamp 8, and the fault type of the corresponding air valve is locally displayed;
and 7: the MCU module 7 can send alarm information to the remote terminal 14 in a classified way through the communication module 11, and when the sending is unsuccessful, the sending can be repeated for many times until the remote terminal 14 receives the alarm information successfully.
Example 2: an air fault detector 6 comprises a shell, a circuit board is connected with an MCU module 7, a man-machine interaction module, a GPS module 10, a communication module 11, a memory card 12 and a gas-liquid signal processing module 13, wherein a monitoring program is preset in the MCU module 7, a pressure sensor 3, a gas-liquid sensor 4, a pressure sensor 3 and a gas-liquid sensor 4 are connected with a side circuit of the MCU module 7 and used for detecting pressure change and gas-liquid state in an air valve 1 and fixedly arranged in a lower valve body of the air valve 1 or on a flange short pipe below a valve seat of the air valve 1; a circuit on the side of the MCU module 7 is also connected with a water leakage detection module 5 for detecting accumulated water in the valve well, and the water leakage detection module 5 is arranged at the bottom of the valve well; the communication module 11 is connected with a line network 14 to send alarm information and data interaction with a remote terminal 15; the power supply 2 is used to supply power to the air fault detector 6.
Illustratively, the power source 2 is a commercial power or a solar cell.
Illustratively, the gas-liquid sensor 4 is embodied as an electrode liquid level sensor, and can detect the resistivity of the fluid medium in the air valve and output an analog quantity signal.
Illustratively, when the gas-liquid sensor 4 is a specific electrode sensor, in order to avoid electrode electrolysis failure, the gas-liquid signal processing module 13 is added, which can provide alternating current for the gas-liquid sensor 4, and convert the resistance signal collected by the gas-liquid sensor 4 into a direct current switching value or analog signal to be output to the MCU module 7 after being judged by a set threshold.
Illustratively, the water leakage detection module 5 is embodied as an electrode liquid level sensor, and can output a switching value signal when the valve well leaks water.
Illustratively, the human-computer interaction module is embodied as an LCD display screen 8 and a keyboard 9, and can display alarm information and data states on site and set diagnosis parameters and alarm logic of the MCU module 7.
Illustratively, the communication module 11 is an industrial communication module, and data transmission and information classification alarm between the fault detector 6 and the remote terminal 15 can be realized through the wired network 14.
The common power consumption type air fault detector in the application embodiment comprises the following steps:
step 1: the diagnostic logic of the MCU module 7 is set via the keyboard 9 and the display screen 8, or via the wired network 14 via the remote terminal 15. The gas-liquid sensor 4 is used for judging the acquired analog quantity signal through a gas-liquid signal processing module 13 through a set threshold value, converting the acquired analog quantity signal into a switching value signal and outputting the switching value signal to the MCU module 7, when the gas-liquid signal processing module 13 has the switching value signal input, the pipeline is anhydrous, the switching value signal input is not existed, the pipeline is hydrated, the pressure set values are two, one is lower than the minimum working pressure of the pipeline, and the other is a negative pressure value allowed by the pipeline;
step 2: when the pipeline is in operation, the gas-liquid sensor outputs a switching value signal through the gas-liquid signal processing module 13, and when a pressure signal of the pressure sensor 3 is greater than a pressure threshold value set by a program of the MCU module 7, the gas-liquid sensor is determined to be an exhaust fault through comparison of set repeated detection times, and the communication module 11 sends exhaust fault alarm information to the remote terminal 15 through the wired network 14;
and step 3: when the pipeline is vacuumized, the gas-liquid sensor 4 installed on the air valve 1 outputs switching value signals through the gas-liquid signal processing module 13, and when the pressure signals of the pressure sensor 3 are larger than the negative pressure threshold value set by the MCU module 7 program, the vacuum fault is determined through comparison of set repeated detection times, and the communication module 11 sends vacuum fault alarm information to the remote terminal 15 through the wired network 14;
and 4, step 4: when the valve well leaks water, the water leakage detection module 5 outputs a switching value signal, the MCU module 7 immediately judges the water leakage fault, and the communication module 11 sends water leakage fault alarm information to the remote terminal 15 through the wired network 14;
and 5: when a corresponding fault occurs, the MCU module 7 provides corresponding fault information to the LED display screen 8, and the fault type of the corresponding air valve is locally displayed;
step 6: the MCU module 7 can send alarm information to the remote terminal 15 by classification through the antenna 14 through the communication module 11, and can repeatedly send the alarm information for a plurality of times when the alarm information is not sent successfully until the alarm information is received successfully by the remote terminal 15;
and 7: when the change value of the pressure value acquired by the MCU module 7 in unit time is larger than the program setting trigger value, the pressure change value can be continuously recorded in the setting time, locally stored in the memory card 12, and the pressure data is transmitted to the remote terminal 15 through the communication module 11 and the antenna 14;
and 8: the remote terminal 15 can perform data graphical processing on the received transient variable flow working condition pressure data, check the pressure inhibition characteristic of a slowly-closed disk of the waterproof hammer type air valve and a negative pressure air inlet node of the vacuum breaker valve, provide resetting parameters for adjusting the opening of the slowly-closed disk of the air valve and the tension of a spring of the vacuum valve, and improve the slowly-closed pressure control performance of the waterproof hammer type air valve or the vacuum air inlet performance of the vacuum valve;
and step 9: for other medium conveying pipelines, the remote terminal 15 can evaluate the water hammer hazard degree of each monitoring node of the pipeline according to the received transient variable flow working condition pressure data and gas-liquid state data, and provides protective measures.
The foregoing description is by way of example only and is not intended as limiting the embodiments of the present application. All obvious variations and modifications of the present invention are within the scope of the present invention.
Claims (11)
1. An air fault detector, characterized by: the intelligent monitoring system comprises an MCU module, a GPS module, a communication module, a gas-liquid signal processing module, a memory card, a man-machine interaction module, a fault LED lamp and an antenna, wherein the MCU module is arranged in a shell and is preset with a monitoring program;
the circuit is connected with a pressure sensor, a gas-liquid sensor, a water leakage detection module and a power supply for supplying electric energy to the air fault detector, wherein the pressure sensor is used for detecting pressure change and gas-liquid state in the air valve;
the pressure sensor and the gas-liquid sensor are arranged in a valve body below the air valve or on a flange short pipe below an air valve seat; the water leakage detection module is arranged at the bottom of the valve well;
meanwhile, the air fault detector can also communicate with a remote terminal through a wireless or wired network to send fault information and transmit monitoring data.
2. An air fault detector according to claim 1, characterized in that: the MCU module is a micro-processing unit, is divided into low power consumption and common power consumption according to the type of a power supply, is respectively programmed with different logic programs for controlling and coordinating the work of each module and the fault lamp, can be externally connected with a large-capacity storage card, has the functions of local data storage and SOCKET subpackage sending and processing, and can send fault alarm information and fluid state data in a classified mode through the communication module.
3. An air fault detector according to claim 2, characterized in that: further, the gas-liquid sensing module is one of a capacitance type liquid level proximity switch, a photoelectric liquid level sensor and an electrode liquid level sensor; the capacitance type liquid level proximity switch or the photoelectric liquid level sensor can detect the property of a fluid medium in the air valve, judge whether the fluid is liquid or air and output a switching value signal; the electrode liquid level sensor can detect the resistivity of the fluid medium in the air valve and the resistivity of the air, judge that the fluid is water or air and output an analog quantity or switching value signal.
4. An air fault detector according to claim 2 or 3, characterized in that: and when the gas-liquid sensor is an electrode liquid level sensor, the gas-liquid signal processing module can convert direct current into alternating current to supply power to the gas-liquid sensor, and converts resistance signals acquired by the gas-liquid sensor into direct current switching value or analog quantity signals to be output to the MCU module after being judged by a set threshold value.
5. An air fault detector according to claim 2, characterized in that: the pressure sensor can detect relative positive pressure and negative pressure, can effectively measure the pressure of the pipeline within the range from negative 0.1MPa to rated high pressure, and outputs an analog quantity signal or a digital signal.
6. An air fault detector according to claim 2, characterized in that: the water leakage detection module is a liquid level float switch or an electrode switch and can output a switching value signal when water is accumulated in the valve well.
7. An air fault detector according to claim 2, characterized in that: the human-computer interaction module is a Bluetooth module, a reed switch magnetic control switch is arranged between the Bluetooth module and the MCU module, the reed switch magnetic control switch can be controlled by a magnet key to be opened, so that a circuit between the Bluetooth module and the MCU module is conducted, a human-computer interaction channel is established through a development program of the smart phone end and the communication of the MCU module, alarm information and data states are displayed on site, limit parameters and alarm logic of the MCU module are set, and after the setting or checking is completed, the magnet key can be moved to close the Bluetooth module so as to save electric energy.
8. An air fault detector according to claim 2, characterized in that: the man-machine interaction module is an LCD display screen and a keyboard, can display alarm information and data states on site, and sets diagnosis parameters and alarm logic of the MCU module.
9. Use of an air fault detector, characterized by: the power supply can be divided into a low power consumption type and a common power consumption type according to the power supply condition; the difference lies in that the data acquisition mode to transient state operating mode is different, and ordinary consumption type air fault detector is not wakened up the restriction by the switching value signal of gas-liquid sensor, when monitoring that the pressure variation value in the pipeline is greater than the threshold value that sets for in the MCU module, can continuously record the pressure variation value in the settlement time, and local storage sends to remote terminal, and transient conversion flow pressure and the gas-liquid state data that gather are more comprehensive complete.
10. Use of an air fault detector according to claim 9, characterized in that: the low-power-consumption air fault detector adopts a low-power-consumption MCU module, a built-in high-capacity battery can be used as a power supply, and the MCU module, the communication module, the GPS module and the human-computer interaction module can be in dormancy and partial dormancy by a programmed logic diagnosis program to maintain low-power-consumption operation;
further, the low power consumption air detector automatically alarms, collects, stores and transmits air faults, normal data and transient data, a logic diagnosis program in the MCU operates by adopting an awakening and re-dormancy mechanism, and awakening conditions and an operation process comprise:
1. the human-computer interaction module adopts a Bluetooth module for checking and setting, the Bluetooth module is started by a magnet key and a reed switch, the MCU module is awakened for interaction and setting, and the Bluetooth module can be disconnected after the magnet key is pulled out, so that the power consumption of the Bluetooth module is avoided;
2. the remote terminal accesses, sets and releases the alarm, requests to wake up the MCU module by the communication module, sleeps again after the set time and can wake up again;
3. when the air valve has exhaust faults, the gas-liquid sensor sends a switching value signal of no water in the air valve to the MCU module, the MCU module is awakened to compare the pressure signal of the pressure sensor, when the detected pressure value is higher than the pressure value set in the MCU module, the pressure signal can be compared at set repeated intervals, after the faults are confirmed, the communication module sends exhaust fault alarms, and the alarm information is sent to sleep again successfully;
4. when the air valve has a vacuum fault, the gas-liquid sensor sends a switching value signal of no water in the air valve to the MCU module, the MCU module is awakened to compare the pressure signal of the pressure sensor, when the detected pressure value is smaller than a set low-pressure value, the pressure signal can be compared at set repeated intervals and time, after the fault is confirmed, the communication module sends a vacuum fault alarm, and the alarm information is sent to sleep again successfully;
5. when the gas-liquid sensor sends a switching value signal of no water in the air valve to the MCU module, the MCU module is awakened to detect a pressure signal of the pressure sensor, when a pressure value rising or falling value in unit time is larger than a pressure fluctuation value set in the MCU module, the pressure sensor is triggered to continuously record pressure data and a gas-liquid state to a local memory card in set time, data are sent to a remote terminal by an SOCKET sub-packaging mechanism, and the remote terminal sleeps again after the data are sent;
6. when the water leakage module outputs a switching value signal to the MCU module, the MCU module is awakened, and a water leakage accident alarm is immediately sent through the communication module;
7. the clock arranged in the MCU module can set time to wake up the local record and send normal pressure and gas-liquid state data to the remote terminal through the communication module.
11. Use of an air fault detector according to claim 9, characterized in that: the common power consumption type air fault detector uses a common power consumption MCU module, is powered by commercial power or a solar power supply, and is internally provided with a logic diagnosis program, so that the MCU module, the communication module, the man-machine interaction module and the GPS module are in a real-time online monitoring state, and the air fault alarm, normal state data and transient state data acquisition, storage and transmission processes are as follows:
1. when the collected pressure signal value is greater than the set pressure and the gas-liquid sensor provides a switching value signal as air, the switching value signal can be compared at set repeated intervals, and an exhaust fault alarm is sent through the communication module after a fault is confirmed;
2. when the collected pressure signal value is smaller than the set low pressure value and the gas-liquid sensor provides a switching value signal as air, the vacuum fault alarm is sent through the communication module after the fault is confirmed through comparison of set repeated interval time;
3. when the switching value signal of the water leakage module is acquired, the water leakage accident alarm is immediately sent through the communication module;
4. the value can be set according to time, and the pipeline pressure and gas-liquid state data can be recorded at regular time, stored locally and uploaded to a remote terminal;
5. when the rising or falling value of the pressure value in unit time is larger than the pressure fluctuation value set in the MCU module, the pressure and the gas-liquid state can be continuously recorded in the set time, and the pressure and the gas-liquid state are locally stored and transmitted to the remote terminal.
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